Personalized Santa Hat Gym Text Gray Youth T-Shirt. The word gym with the letter G in the word gym wearing a Santa hat is a funny Christmas gift design for exercise buffs, body builders, trainers, gymnasts and physical education teachers. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.